copying cfg file to central repo, fix ssh host key

+ some other improvements

install.py

@@ -44,6 +44,8 @@ except ImportError as e:
         exit('')
 
 
+CENTRAL_BOXTOOLS_REPO = 'l_samenv@linse-c:boxtools/'
+
 main_ports = {22}  # ssh
 
 router_ports = set()
@@ -281,6 +283,26 @@ SERVICES = dict(router=router, display=display, frappy=frappy, boxweb=boxweb)
 AS_ROOT = {'router', 'display'}
 
 
+def update_host_key():
+    hostname = Path('/etc/hostname').read_text().strip().split('.')[0]
+    try:
+        for pubkey in Path('/etc/ssh').glob('ssh_host*key.pub'):
+            pubhost = pubkey.read_text().split('\n')[0].rsplit('@')[-1]
+            if pubhost == hostname:
+                continue  # no need to change keys
+            print('-- need new ssh host key:', pubhost, '!=', hostname)
+            break
+        else:
+            return  # no changed hostname found
+        do_cmd('mkdir -p /etc/ssh/host_key_backup')
+        for file in Path('/etc/ssh').glob('ssh_host*key*'):
+            do_cmd('mv', file, '/etc/ssh/host_key_backup/')
+        do_cmd(f'ssh-keygen -A')
+    except BaseException:
+        for file in Path('/etc/ssh/host_key_backup').glob('*'):
+            do_cmd('mv', file, '/etc/ssh/')
+
+
 def write_when_new(filename, content, as_root=False, ignore_reduction=False):
     if content is None:
         lines = []
@@ -289,11 +311,15 @@ def write_when_new(filename, content, as_root=False, ignore_reduction=False):
             content += '\n'
         lines = content.split('\n')
     try:
-        os.makedirs(Path(filename).parent, exist_ok=True)
-        for parent in reversed(Path(filename).absolute().parents):
-            unix_cmd('chmod', 'o+rx', parent, sudo=True)
-        with open(filename) as fil:
-            old = fil.read()
+        filepath = Path(filename)
+        try:
+            filepath.parent.mkdir(parents=True)
+            # os.makedirs(Path(filename).parent, exist_ok=True)
+            for parent in reversed(Path(filename).absolute().parents):
+                unix_cmd('chmod', 'o+rx', parent, sudo=True)
+        except FileExistsError:
+            pass  # do not complain when dir exists, and do not set mode
+        old = filepath.read_text()
     except FileNotFoundError:
         old = None
     #except Exception as e:
@@ -527,10 +553,13 @@ def handle_config():
         print(f'{box.cfgfile} not found', e)
 
     if box.oldcfg:
-        print(f'convert {box.cfgfile} to {convert_cfg(box.cfgfile, box.macaddr)}')
+        converted = convert_cfg(box.cfgfile, box.macaddr)
+        print(f'convert {box.cfgfile} to {converted}')
+        box.cfgfile = converted
         config = box.read_config()
 
     cfgfile = box.cfgfile
+    unix_cmd('scp', str(cfgfile), f'{CENTRAL_BOXTOOLS_REPO}/cfg/', sudo=False)
     newhostname = box.hostname
     if cfgfile:
         if box.hwtype != 'apu':
@@ -605,13 +634,14 @@ def handle_config():
                 show.dirty = True
         config = box.read_config()
     box.hostname = newhostname
+    update_host_key()
     if cfgfile is None:
         return False
     to_start = {}  # dict <service> of <action>, <as_root>
     ifname = ''
     try:
         netcfg = config.get('NETWORK', {})
-        if netcfg:  # when not network is specified, do not handle network at all
+        if netcfg:  # when no network is specified, do not handle network at all
             for name in netcfg:
                 if name not in box.network_interfaces:
                     print(f'{name} is currently not a valid network interface - skip')

utils.py

@@ -258,13 +258,16 @@ def unix_cmd(cmd, *args, execute=None, stdout=PIPE, sudo=True):
         command.insert(1, '--user')
     if sudo:
         command.insert(0, 'sudo')
-    # sudo = ['sudo'] if sudo else []
     if execute is not False:  # None or True
         if execute:
             print('$', *command)
-        # result = Popen(sudo + command, stdout=stdout).communicate()[0]
-        result = Popen(command, stdout=stdout).communicate()[0]
-        return (result or b'').decode()
+        try:
+            result = Popen(command, stdout=stdout).communicate()[0]
+            return (result or b'').decode()
+        except Exception as e:
+            print(f'error {e!r}')
+        finally:
+            pass
     else:
         print('>', *command)